Net core 6 序列化和反序列化异常

Question

我创建了一个 Web API。我使用过 Net Core 6 和 Entity 框架。在这个方法中我想保存两个实体。StockPosition 已保存，但 StockTransaction 存在一些问题。我有一个错误：

System.NotSupportedException：不支持“System.IntPtr”实例的序列化和反序列化。路径：$.TargetSite.MethodHandle.Value。---> System.NotSupportedException：不支持“System.IntPtr”实例的序列化和反序列化。

数据dto：

public class StockPositionBuyDto
{
   public int Id { get; set; }
   public int IdCurrency { get; set; }
   public decimal Count { get; set; }
   public decimal Price {get; set; }
   public decimal Fee { get; set; }

}

public class StockTransaction
{
    public int Id { get; set; }
    public StockPosition Position { get; set; }
    public string Type { get; set; }
    public decimal Count { get; set; }

    public decimal Price { get; set; }

    public decimal Fee { get; set; }

    public Currency Currency { get; set; }
}


public IActionResult newStockPosition(StockPositionBuyDto dto) 
{
    try
    {
        string jwt = Request.Cookies["jwt"];

        var token = jwtService.verify(jwt);

        int userId = int.Parse(token.Issuer);


        User user = userRepository.findById(userId);
      
        Currency currency = this.currencyRepository.getById(dto.IdCurrency);
        
        StockPosition stockPosition = new StockPosition
        {
            Stock = this.stockRepository.getById(dto.Id),
            Count = dto.Count,
            User = user
        };

        

        StockPosition position = this.stockPositionRepository.create(stockPosition);

        
        StockTransaction transaction = new StockTransaction
        {
            Type = "buy",
            Count = dto.Count,
            Price = dto.Price,
            Fee = dto.Fee,
            Currency = currency,
            Position = position

        };

       
        StockTransaction transactionSaved =  this.stockTransactionRepository.create(transaction);

        return Ok("Ok");
    }
    catch (Exception ex)
    {
        return Unauthorized(ex);
    }

}

用于保存的存储库。

public StockTransaction create(StockTransaction transaction)
{
    context.stockTransactions.Add(transaction);
    transaction.Id = context.SaveChanges();

    return transaction;
}

Answer 1

问题在于：

...
catch(Exception ex) {
         return Unauthorized(ex)
    }

方法Unauthorized本身尝试序列化ex但不能，抛出您看到的错误。在这种情况下，错误消息System.NotSupportedException: Serialization and deserialization of 'System.IntPtr'.... 肯定会令人困惑。尝试返回

...
catch {
    return new JsonResult(new {error=ex.Message});
}

会得到正确的错误。感谢@Andrew Williamson 指出了正确的方向。